[69MyWay]

I just talked to Mark at Precision Shaft Technologies.

Based on the hp, PRM, and use of the car he is recommending a 3.5" steel shaft with the 1330 (FORD) rear joint that is good up to 700 hp.

You guys are right too. Without me telling him - he guessed exactly where it had broken and said it is a crictical speed issue. MAN...am I a believer now! While I have almost always had my shafts balanced, I haven't always upgraded them. I have had them shortened and lengthened before - but on "STREET" cars I hadn't sweated this before. On my Corvettes the shaft is more or less fixed as the diff is mounted solid and there is very little movement or issue. Also, they are substantially shorter. However, it could be cause there too to be aware of.

Aluminum would be cool - but just isn't needed.

Shaft will be here next week.

Okay...still mulling over the possible battery cable options. You can come up with a bad scenario for anything in terms of ways to short the cable or start a fire.

Did you guys know the new BMW's have pyro technology in their main battery cable? When the Airbag system senses a crash the main battery cable will blow a charge and kill the connection to the car. That prevents a live battery and cable from burning things down. It is a really cool concept until you have a BMW blow the cable...and you didn't know it had one...and you spend days and days and days trying to figure out why there is no power in the car!